Junos OS Release 19.2R2 User Manual
Release Notes: Junos®OS Release 19.2R2 for
the ACX Series, EX Series, MX Series, NFX
Series, PTX Series, QFX Series, SRX Series, and
Junos Fusion
1
22 April 2021
Contents
Introduction | 10
New Features in 19.2R2 | 10
Junos OS Release Notes for ACX Series | 10
What's New | 11
What's New in Release 19.2R2 | 11
What's New in Release 19.2R1-S1 | 12
What's New in Release 19.2R1 | 12
What's Changed | 16
What’s Changed in 19.2R2 | 17
What’s Changed in 19.2R1 | 17
Known Limitations | 19
General Routing | 19
Open Issues | 21
General Routing | 22
MPLS | 24
Resolved Issues | 24
Resolved Issues: 19.2R2 | 25
Resolved Issues: 19.2R1-S1 | 28
Resolved Issues: 19.2R1 | 28
Documentation Updates | 29
Installation and Upgrade Guide | 30
Migration, Upgrade, and Downgrade Instructions | 30
Upgrade and Downgrade Support Policy for Junos OS Releases | 30
Junos OS Release Notes for EX Series Switches | 32
What’s New | 32
What’s New in Release 19.2R2 | 33
Whats’s New in Release 19.2R1-S1 | 33
What’s New in Release 19.2R1 | 33
What’s Changed | 38
What’s Changed in Release 19.2R2 | 38
What’s Changed in Release 19.2R1-S5 | 39
What’s Changed in Release 19.2R1 | 40
Known Limitations | 41
2
EVPN | 42
General Routing | 42
Platform and Infrastructure | 42
Open Issues | 43
Authentication and Access Control | 43
General Routing | 43
Infrastructure | 44
Interfaces and Chassis | 45
Platform and Infrastructure | 45
Spanning Tree Protocols | 45
Resolved Issues | 46
Resolved Issues: 19.2R2 | 46
Resolved Issues: 19.2R1 | 54
Documentation Updates | 58
Installation and Upgrade | 58
Migration, Upgrade, and Downgrade Instructions | 59
Upgrade and Downgrade Support Policy for Junos OS Releases | 59
Junos OS Release Notes for Junos Fusion Enterprise | 60
New and Changed Features | 60
Changes in Behavior and Syntax | 61
Known Behavior | 61
Known Issues | 62
Junos fusion for enterprise | 62
Resolved Issues | 63
Resolved Issues: 19.2R2 | 63
Resolved Issues: 19.2R1 | 64
Documentation Updates | 64
Migration, Upgrade, and Downgrade Instructions | 65
Basic Procedure for Upgrading Junos OS on an Aggregation Device | 65
Upgrading an Aggregation Device with Redundant Routing Engines | 67
Preparing the Switch for Satellite Device Conversion | 68
Converting a Satellite Device to a Standalone Switch | 69
Upgrade and Downgrade Support Policy for Junos OS Releases | 69
Downgrading from Junos OS | 70
3
Junos OS Release Notes for Junos Fusion Provider Edge | 71
What's New | 71
What’s New in Release 19.2R2 | 72
What’s New in Release 19.2R1 | 72
What’s Changed | 72
Known Limitations | 73
Open Issues | 73
Junos Fusion Provider Edge | 74
Resolved Issues | 74
Resolved Issues: 19.2R2 | 75
Resolved Issues: 19.2R1 | 75
Documentation Updates | 75
Migration, Upgrade, and Downgrade Instructions | 76
Basic Procedure for Upgrading an Aggregation Device | 76
Upgrading an Aggregation Device with Redundant Routing Engines | 79
Preparing the Switch for Satellite Device Conversion | 79
Converting a Satellite Device to a Standalone Device | 81
Upgrading an Aggregation Device | 83
Upgrade and Downgrade Support Policy for Junos OS Releases | 84
Downgrading from Junos OS Release 19.2 | 84
Junos OS Release Notes for MX Series 5G Universal Routing Platform | 85
What’s New | 85
What’s New in 19.2R2 | 86
What’s New in 19.2R1-S4 | 86
What’s New in 19.2R1-S1 | 87
What’s New in 19.2R1 | 88
What's Changed | 106
What’s Changed in Release 19.2R2 | 106
What’s Changed in Release 19.2R1 | 110
Known Limitations | 113
General Routing | 114
Interfaces and Chassis | 116
Platform and Infrastructure | 117
Routing Protocols | 117
4
Open Issues | 117
Class of Service (CoS) | 118
EVPN | 118
Forwarding and Sampling | 119
General Routing | 119
Infrastructure | 124
Interfaces and Chassis | 124
Junos Fusion Provider Edge | 125
Layer 2 Features | 125
MPLS | 125
Network Management and Monitoring | 126
Platform and Infrastructure | 126
Routing Protocols | 127
User Interface and Configuration | 128
VPNs | 128
Resolved Issues | 129
Resolved Issues: 19.2R2 | 129
Resolved Issues: 19.2R1 | 158
Documentation Updates | 174
Installation and Upgrade Guide | 175
Subscriber Management Provisioning Guide | 175
Migration, Upgrade, and Downgrade Instructions | 176
Basic Procedure for Upgrading to Release 19.2 | 177
Procedure to Upgrade to FreeBSD 11.x based Junos OS | 177
Procedure to Upgrade to FreeBSD 6.x based Junos OS | 179
Upgrade and Downgrade Support Policy for Junos OS Releases | 181
Upgrading a Router with Redundant Routing Engines | 182
Downgrading from Release 19.2 | 182
Junos OS Release Notes for NFX Series | 183
What’s New | 183
What’s New in Release 19.2R2 | 184
What’s New in Release 19.2R1 | 184
5
Architecture | 184
Application Security | 184
Virtual Network Functions | 184
What’s Changed | 185
What’s Changed in Release 19.2R2 | 186
What’s Changed in Release 19.2R1 | 186
Known Limitations | 186
Interfaces | 187
Platform and Infrastructure | 187
Virtual Network Functions (VNFs) | 188
Open Issues | 188
Interfaces | 189
Platform and Infrastructure | 189
Routing Protocols | 190
Virtual Network Functions (VNFs) | 190
Resolved Issues | 191
Resolved Issues: 19.2R2 | 191
Resolved Issues: 19.2R1 | 193
Documentation Updates | 194
Migration, Upgrade, and Downgrade Instructions | 194
Upgrade and Downgrade Support Policy for Junos OS Releases | 195
Basic Procedure for Upgrading to Release 19.2 | 195
Junos OS Release Notes for PTX Series Packet Transport Routers | 196
What's New | 197
New and Changed Features: 19.2R2 | 198
New and Changed Features: 19.2R1-S4 | 198
New and Changed Features: 19.2R1-S1 | 199
New and Changed Features: 19.2R1 | 200
What’s Changed | 205
What’s Changed in Release 19.2R2 | 205
What’s Changed in Release 19.2R1 | 207
Known Limitations | 209
General Routing | 210
6
Interfaces and Chassis | 210
Open Issues | 211
General Routing | 211
Interfaces and Chassis | 212
Layer 2 Ethernet Services | 212
Routing Protocols | 212
Resolved Issues | 212
Resolved Issues: 19.2R2 | 213
Resolved Issues: 19.2R1 | 216
Documentation Updates | 219
Installation and Upgrade Guide | 219
Migration, Upgrade, and Downgrade Instructions | 220
Basic Procedure for Upgrading to Release 19.2 | 220
Upgrade and Downgrade Support Policy for Junos OS Releases | 223
Upgrading a Router with Redundant Routing Engines | 223
Junos OS Release Notes for the QFX Series | 224
What's New | 224
What’s New in Release 19.2R2 | 225
What's New in Release 19.2R1-S1 | 225
What's New in Release 19.2R1 | 226
What's Changed | 234
What’s Changed in Release 19.2R2 | 234
What’s Changed in Release 19.2R1 | 237
Known Limitations | 239
EVPN | 239
Layer 2 Features | 239
Platform and Infrastructure | 239
Routing Protocols | 240
Open Issues | 241
EVPN | 241
Infrastructure | 242
Interfaces and Chassis | 242
Layer 2 Features | 242
7
MPLS | 242
Platform and Infrastructure | 242
Routing Protocols | 245
Virtual Chassis | 245
Resolved Issues | 246
Resolved Issues: 19.2R2 | 246
Resolved Issues: 19.2R1 | 260
Documentation Updates | 266
Installation and Upgrade guide | 266
Migration, Upgrade, and Downgrade Instructions | 267
Upgrading Software on QFX Series Switches | 267
Installing the Software on QFX10002-60C Switches | 270
Installing the Software on QFX10002 Switches | 270
Upgrading Software from Junos OS Release 15.1X53-D3X to Junos OS Release
15.1X53-D60, 15.1X53-D61.7, 15.1X53-D62, and 15.1X53-D63 on QFX10008 and
QFX10016 Switches | 271
Installing the Software on QFX10008 and QFX10016 Switches | 273
Performing a Unified ISSU | 277
Preparing the Switch for Software Installation | 278
Upgrading the Software Using Unified ISSU | 278
Upgrade and Downgrade Support Policy for Junos OS Releases | 280
Junos OS Release Notes for SRX Series | 281
What’s New | 282
New and Changed Features: 19.2R2 | 282
New and Changed Features: 19.2R1-S1 | 283
New and Changed Features: 19.2R1 | 283
What's Changed | 292
Release 19.2R2 Changes in Behavior and Syntax | 292
Release 19.2R1 Changes in Behavior and Syntax | 293
Known Limitations | 294
DHCP | 295
Flow-Based and Packet-Based Processing | 295
J-Web | 295
VPNs | 295
Open Issues | 296
8
Chassis Clustering | 297
Flow-Based and Packet-Based Processing | 297
Intrusion Detection and Prevention (IDP) | 297
J-Web | 297
Platform and Infrastructure | 298
Routing Policy and Firewall Filters | 298
VPNs | 298
Resolved Issues | 299
Resolved Issues: 19.2R2 | 299
Resolved Issues: 19.2R1 | 309
Documentation Updates | 316
Migration, Upgrade, and Downgrade Instructions | 316
Upgrade and Downgrade Support Policy for Junos OS Releases and Extended End-Of-Life
Releases | 316
Upgrading Using ISSU | 318
Licensing | 318
Compliance Advisor | 318
Finding More Information | 319
Documentation Feedback | 319
Requesting Technical Support | 320
Self-Help Online Tools and Resources | 320
Opening a Case with JTAC | 321
Revision History | 321
9
Introduction
Junos OS runs on the following Juniper Networks®hardware: ACX Series, EX Series, M Series, MX Series,
NFX Series, PTX Series, QFabric systems, QFX Series, SRX Series, T Series, and Junos Fusion.
These release notes accompany Junos OS Release 19.2R1 for the ACX Series, EX Series, MX Series, NFX
Series, PTX Series, QFX Series, SRX Series, and Junos Fusion. They describe new and changed features,
limitations, and known and resolved problems in the hardware and software.
New Features in 19.2R2
Release Note SectionsFeatures
10
“What’s New” on page 85Support for 64-bit architecture added for use of management
interface in a non-default routing instance in op scripts and JET
applications (MX Series)
Implement new MIBs using telemetry-based model (MX Series and
PTX Series)
Option to pause BGP multipath computation during BGP peering
churn (MX Series, PTX Series, and QFX Series)
“What’s New” on page 85 and “What's New” on
page 197
“What’s New” on page 85, “What's New” on
page 197, and “What's New” on page 224
“What’s New” on page 85CoA messages support Session-Timeout attribute (MX Series)
“What’s New” on page 282HTTP X-Forwarded-For header support in IDP (SRX Series)
Junos OS Release Notes for ACX Series
IN THIS SECTION
What's New | 11
What's Changed | 16
Known Limitations | 19
Open Issues | 21
Resolved Issues | 24
Documentation Updates | 29
Migration, Upgrade, and Downgrade Instructions | 30
These release notes accompany Junos OS Release 19.2R2 for the ACX Series. They describe new and
changed features, limitations, and known and resolved problems in the hardware and software.
You can also find these release notes on the Juniper Networks Junos OS Documentation webpage, located
at https://www.juniper.net/documentation/product/en_US/junos-os.
What's New
11
IN THIS SECTION
What's New in Release 19.2R2 | 11
What's New in Release 19.2R1-S1 | 12
What's New in Release 19.2R1 | 12
Learn about new features introduced in the Junos OS main and maintenance releases for ACX Series
routers.
What's New in Release 19.2R2
There are no new features on ACX Series in Release 19.2R2.
What's New in Release 19.2R1-S1
Routing Protocols
Decouple RSVP for IGP-TE (MX Series, PTX Series, ACX Series, QFX Series, SRX Series, and EX
•
Series)—Starting in Junos OS Release 19.2R1-S1, device can advertise selective traffic-engineering
attributes such as admin-color and maximum-bandwidth, without enabling RSVP, for segment routing
and interior gateway protocol (IGP) deployments.
What's New in Release 19.2R1
Class of Service (CoS)
Support for class of service (CoS)(ACX6360 routers)—Starting in Junos OS Release 19.2R1, ACX6360
•
routers support class of service (CoS) functionality.
CoS is the assignment of traffic flows to different service levels. Service providers can use router-based
CoS features to define service levels that provide different delay, jitter (delay variation), and packet loss
characteristics to particular applications served by specific traffic flows.
12
[See CoS on ACX Series Universal Metro Routers Features Overview.]
EVPN
EVPN support of VLAN ID ranges and lists in service provider style interface configurations (EX9200
•
switches, ACX5448 and MX Series routers, and vMX virtual routers)—Starting in Junos OS Release
19.2R1, EX9200 switches, ACX5448 and MX Series routers, and vMX virtual routers support the use
of VLAN ID ranges and lists in a service provider style interface configuration, which must be referenced
in an EVPN routing instance. This configuration is supported with the following EVPN environments,
services, and features:
Environments:
•
EVPN with VXLAN encapsulation
•
EVPN with MPLS encapsulation
•
VLAN bundle service:
•
E-LAN
•
E-Tree
•
E-Line
•
Feature:
•
EVPN multihoming:
•
All-active
•
Single-active
•
Singlehoming
•
[See VLAN ID Ranges and Lists in an EVPN Environment.]
Interfaces and Chassis
Support for 100-Mbps and 1-Gbps speeds on Tri-Rate Copper SFP (ACX5448 routers)—Starting in
•
Junos OS Release 19.2R1, ACX5448 routers support 100-Mbps and 1-Gbps speeds on Tri-Rate Copper
SFP optics (part number 740-013111).
NOTE: 100-Mbps speed is supported only on ports xe-0/0/24 through xe-0/0/47.
10-Mbps speed is not supported on Tri-Rate Copper SFP due to hardware limitations.
To set the speed for the optics, issue the set interfaces interface-name speed auto command. [See
•
Speed for more details.]
To enable autonegotiation, issue the set interfaces interface-name gigether-options auto-negotiation
•
command. [See auto-negotiation.]
13
Junos Telemetry Interface
Support for LSP statistics on JTI (ACX6360)—Starting with Junos OS Release 19.2R1, you can provision
•
the LSP statistics sensor using the resource path /junos/services/label-switched-path/usage/ to monitor
per-MPLS LSP statistics on the ACX6360 router and export telemetry data through Junos telemetry
interface (JTI) to external collectors. You can stream data at configurable intervals through gRPC without
involving polling.
JTI support is only for RSVP LSPs.
Statistics that are streamed are similar to the output displayed by the operational mode command show
mpls lsp bypass statistics.
To provision a sensor to export data through gRPC, use the telemetrySubscribe RPC to specify telemetry
parameters. Streaming telemetry data through gRPC also requires the OpenConfig for Junos OS module.
Starting in Junos OS Release 18.3R1, OpenConfig and Network Agent packages are bundled into the
Junos OS image by default. Both packages support JTI.
To enable statistics for export from the Junos OS, include the sensor-based-stats statement at the [edit
protocols mpls] hierarchy level.
[See Guidelines for gRPC Sensors (Junos Telemetry Interface) and Understanding OpenConfig and gRPC
on Junos Telemetry Interface.]
•
Specify Routing Instance for JTI (ACX Series, MX Series, PTX Series, and QFX Series)—Starting in Junos
OS Release 19.2R1, you can specify the routing instance to use for remote procedure call (gRPC) services.
Include the routing-instance instance-name at the [edit system services extension-service
request-response grpc] hierarchy level. The routing instance name specified should match the name of
the existing routing instance, such as a name configured under the [routing-instances] hierarchy level
or mgmt_junos if system management-instance is configured (the dedicated management routing
instance).
Configuring the routing instance lets you choose the VRF for gRPC services. When the routing instance
is not configured, the default behavior is that all gRPC-related services are available through the
management fxp0/em0) interface.
Layer 3 Features
Support for Layer 3 unicast features (ACX 6360)—Starting in Junos OS Release 19.2R1, ACX routers
•
support the following Layer 3 forwarding features for unicast IPv4 and IPv6 traffic:
Basic IPv6 forwarding
•
Virtual router (VRF-lite) for both IPv4 and IPv6
•
Layer 3 subinterfaces support for both IPv4 and IPv6
•
VRF-lite, subinterfaces, and IPv6 forwarding support on link aggregation groups (LAGs)
•
Statistics support for Layer 3 subinterfaces
•
14
32-way equal-cost multipath (ECMP)
•
Centralized Bidirectional Forwarding Detection (BFD)
•
IPv4 Layer 3 protocols:
•
OSPF
•
IS-IS
•
BGP
•
IPv6 Layer 3 protocols:
•
OSPFv3
•
RIPng
•
Network Management and Monitoring
Support for displaying valid user input in the CLI for command options and configuration statements
•
in custom YANG data models (ACX Series)—Starting in Junos OS Release 19.2R1, the CLI displays the
set of possible values for a given command option or configuration statement in a custom YANG data
model when you include the action-expand extension statement in the option or statement definition
and reference a script that handles the logic. The action-expand statement must include the script child
statement, which defines the Python action script that is invoked when a user requests context-sensitive
help in the CLI for the value of that option or statement.
[See Displaying Valid Command Option and Configuration Statement Values in the CLI for Custom YANG
Modules.]
Software Installation and Upgrade
Zero Touch Provisioning (ACX5448)—Starting in Junos OS Release 19.2R1, Zero Touch Provisioning
•
(ZTP) automates the provisioning of the device configuration and software image with minimal manual
intervention on management interface em0.
15
When you physically connect a router to the network and boot it with a factory configuration, the router
upgrades the Junos OS software image automatically and automatically installs a configuration file from
the network through the management interface.
[See Zero Touch Provisioning.]
System Management
Support for transferring accounting statistics files and router configuration archives using HTTP URL
•
(ACX Series)—Starting in Junos OS Release 19.2R1, you can transfer accounting statistics files and router
configuration archives to remote servers by using an HTTP URL. In addition to SCP and FTP, the following
HTTP URL will be supported under the archive-sites statement:
http://username@host:url-path password password
To transfer accounting statistics files, configure archive-sites under [edit accounting-options file
•
<filename>] hierarchy.
To transfer router configuration archival, configure archive-sites under edit system archival
•
configuration hierarchy.
To view the statistics of transfer attempted, succeeded, and failed, use the show accounting server
•
statistics archival-transfer command.
To clear the statistics of transfer attempted, succeeded, and failed, use the clear accounting server
•
statistics archival-transfer command.
[See archive-sites, Backing Up Configurations to an Archive Site, show accounting server statistics
archival-transfer, and clear accounting server statistics archival-transfer].
Precision Time Protocol (PTP) Transparent Clock with IPv6 Transport (PTX10001-20C and ACX6360-OR
•
devices)—Starting with Junos OS Release 19.2R1, PTP uses IPv6 transport to synchronize clocks
throughout a packet-switched network. With a transparent clock, the PTP packets are updated with
theresidence time as the packets pass through the switch. There is no master/slaved designation.
End-to-end transparent clocks are supported. With an end-to-end transparent clock, only the residence
time is included. The residence time can be sent in a one-step process, which means that the timestamps
are sent in one packet.
You can configure the transparent clock at the [edit protocols ptp] Junos OS CLI hierarchy.
[See Understanding Transparent Clocks in Precision Time Protocol.]
SEE ALSO
What's Changed | 16
Known Limitations | 19
16
Open Issues | 21
Resolved Issues | 24
Documentation Updates | 29
Migration, Upgrade, and Downgrade Instructions | 30
What's Changed
IN THIS SECTION
What’s Changed in 19.2R2 | 17
What’s Changed in 19.2R1 | 17
Learn about what changed in the Junos OS main and maintenance releases for ACX Series routers.
What’s Changed in 19.2R2
General Routing
Support for gigether-options statement (ACX5048, ACX5096)—Junos OS supports the gigether-options
•
statement at the [edit interfaces interface-name] hierarchy on the ACX5048 and ACX5096 routers.
Previously, support for the gigether-statement was deprecated.
[See gigether-options and ether-options.]
Interfaces and Chassis
Support for creating Layer 2 logical interfaces independently (ACX Series, EX Series, MX Series, PTX
•
Series, and QFX Series)—In Junos OS Releases 18.4R1, 18.4R2, 19.1R1, and later, ACX Series routers
support creating Layer 2 logical interfaces independent of the Layer 2 routing-instance type. That is,
you can configure and commit the Layer 2 logical interfaces separately and add the interfaces to the
bridge domain or Ethernet VPN (EVPN) routing instance separately. Note that the Layer 2 logical interfaces
work fine only when they are added to the bridge domain or EVPN routing instance.
In earlier Junos OS releases, when you use a Layer 2 logical interface configuration (units with
encapsulation vlan-bridge configuration), then you must add the logical interface as part of a bridge
domain or EVPN routing instance for the commit to succeed.
17
Operation, Administration, and Maintenance (OAM)
Performance monitoring history data is lost when a change in number of supported history records is
•
detected (ACX Series and MX Series)—In Junos OS Release 19.2R2, when Ethernet connectivity fault
management starts, it detects the number of history records supported by the existing Performance
Monitoring history database and if there is any change from the number of history records supported
(that is, 12) in Release 19.2R2, then the existing performance monitoring history database is cleared and
all performance monitoring sessions are restarted with mi-index 1.
Routing Protocols
XML RPC equivalent included for the show bgp output-scheduler | display xml rpc CLI command (ACX
•
Series, EX Series, MX Series, PTX Series, QFX Series, and SRX Series)—Starting in Junos OS Release
19.2R2, we have included an XML RPC equivalent for the show bgp output-scheduler | display xml rpc
CLI command. In Junos OS releases before Release 19.2R2, the show bgp output-scheduler | display
xml rpc CLI command does not have an XML RPC equivalent.
[See show bgp output-scheduler.]
What’s Changed in 19.2R1
Interfaces and Chassis
Monitoring information available only in trace log (ACX Series)—In Junos OS Release 19.2R1 and later,
•
the Ethernet link fault management daemon (lfmd) in the peer router stops monitoring the locally occurred
errors until ISSU completes. You can view the monitoring-related details only through the trace log file.
Junos OS XML, API, and Scripting
Mandatory configurations and omission of <database-status-information> tag in platforms supporting
•
Open ROADM standard (ACX6160-T)—Starting in Junos OS Release 19.2R1, it is mandatory to apply
rfc-compliant option at the [edit system services netconf] hierarchy level and unhide option at the [edit
system services netconf unified] hierarchy level. Also, <database-status-information> tag is omitted for
<get> RPC query.
[See <get> and netconf.]
Network Management and Monitoring
The show system schema command and <get-yang-schema> RPC require specifying an output directory
•
(ACX Series)—Starting in Junos OS Release 19.2R1, when you issue the show system schema operational
mode command in the CLI or execute the <get-yang-schema> RPC in a remote session to retrieve
schema files, you must specify the directory in which to generate the output files by including the
output-directory command option in the CLI or the <output-directory> element in the RPC. In earlier
releases, you can omit the output-directory argument when requesting a single module to display the
module in standard output.
18
Custom YANG RPC support for input parameters of type empty (ACX Series)—Starting in Junos OS
•
Release 19.2R1, custom YANG RPCs support input parameters of type empty when executing the RPC’s
command in the Junos OS CLI, and the value passed to the action script is the parameter name. In earlier
releases, input parameters of type empty are only supported when executing the RPC in a NETCONF
or Junos XML protocol session, and the value passed to the action script is the string 'none'.
[See Creating Action Scripts for YANG RPCs on Devices Running Junos OS.]
VLAN Infrastructure
Specifying a descending VLAN ID range ( ACX5448 routers)—In Junos OS releases prior to Junos OS
•
Release 19.2R1, the system accepts a descending range—for example, 102-100, with the vlan-id-range
configuration statement in the [edit interfaces interface-name unit logical-unit-number] hierarchy.
Starting with Junos OS Release 19.2R1, the system considers a descending range specified with
vlan-id-range to be invalid and raises an error if you try to commit this configuration.
SEE ALSO
What's New | 11
Known Limitations | 19
Open Issues | 21
Resolved Issues | 24
Documentation Updates | 29
Migration, Upgrade, and Downgrade Instructions | 30
Known Limitations
IN THIS SECTION
General Routing | 19
Learn about known limitations in this release for ACX Series routers.
For the most complete and latest information about known Junos OS defects, use the Juniper Networks
online Junos Problem Report Search application.
General Routing
19
All PTP packets go to the best-effort queue instead of the network control queue. This is because of
•
the limitation on ACX5448 where DSCP values are not preserved. PR1361315
ACX6360 Junos telemetry interface or telemetry infrastructure does not support the interface-filtering
•
capability. Therefore, after you enable a particular sensor for telemetry, it is turned on for all the interfaces.
PR1371996
For an Ethernet (et) interface, only the PRE_FEC_SD defect is raised and no OTN alarm is raised.
•
PR1371997
On ACX6360, the CLI static-cak command encryption does not work between two ACX-OX transpoder
•
nodes. PR1389802
The ACX6360 TIC has only 8 CFP2-DCO ports, so chassis beacon show/requests to port numbers larger
•
than 7 do not work (as the ports don't exist) but also do not report an error. user@router> request
chassis beacon fpc 0 pic-slot 1 port 15 on FPC 0 PIC 1 PORT 15 ON regress@node> show chassis
beacon fpc 0 pic-slot 1 port-range lower-limit 0 upper-limit 15 FPC 0 PIC 1 PORT 0 ON FPC 0 PIC 1
PORT 1 ON FPC 0 PIC 1 PORT 2 ON FPC 0 PIC 1 PORT 3 ON FPC 0 PIC 1 PORT 4 ON FPC 0 PIC 1
PORT 5 ON FPC 0 PIC 1 PORT 6 ON FPC 0 PIC 1 PORT 7 ON FPC 0 PIC 1 PORT 8 ON FPC 0 PIC 1
PORT 9 ON FPC 0 PIC 1 PORT 10 OFF FPC 0 PIC 1 PORT 11 OFF FPC 0 PIC 1 PORT 12 OFF FPC 0
PIC 1 PORT 13 OFF FPC 0 PIC 1 PORT 14 OFF FPC 0 PIC 1 PORT 15 ON PR1399335
When the timing configuration and the corresponding interface configuration is flapped for multiple
•
times in iteration, PTP is stuck in "INITIALIZE" state where the ARP for the neighbor is not resolved. In
issue state, BCM hardware block get into inconsistency state, where the lookup is failing. PR1410746
The input packet count given under the traffic statistics includes all packets that are coming in. The
•
statistics are not segregated as IPv4, IPv6, MPLS, and so on. This is the same behavior across all the ACX
Series platforms. PR1419143
Hardware-based fragmentation or reassembly is not supported. Software-based fragmentation rates
•
are going to be extremely slow depending CPU load. PR1419371
In the output of show SNMP mib walk jnxBoxAnatomy, the chassis CLEI code and contents model is
•
reading data from the I2C bus and EEPROM. Because the fan is not present on the i2c bus and does not
have EEPROM, fan data cannot be displayed for chassis cleicode and contents model. PR1420639
There is no support on separate counters for tail-dropped packets. Counters are reflected as part of
•
RED-dropped packets. PR1427148
When end device (fan tray CPLD) I2C line is grounded or pulled low, which is leading to other device
•
write/reads are failing. PR1427222
These error messages can be seen sometimes if the optics is being unplugged in between the eeprom
•
read. This is expected and does not impact any functionality. PR1429016
Packet rates are not seen for aggregated Ethernet logical interface. PR1429590
•
Multicast packets are flooded in a BD if snooping is not enabled. If interfaces x and y belong to a BD,
•
then all multicast packets will be flooded to both x and y interface. If packets are received from interface
x, packets will be flooded to x & y in ingress but discarded in the egress path for interface x because the
packet is received from the same interface. But these packets are also counted in the VOQ and hence
we are seeing more queue statistics. It is a known hardware limitation. monitor interface xe-0/0/30Input
packets: 177958 (64 pps) [0]Output packets: 357306 (128 pps) [0] monitor interface xe-0/0/12Input
packets: 361161 (128 pps) [642]Output packets: 179878 (63 pps) [320] user@router> show interfaces
queue xe-0/0/30 Queue: 0, Forwarding classes: best-effortQueued:Packets : 544032 192 pps . => Sum
of 64 + 128pps root@rioxd-p2a-a> show interfaces queue xe-0/0/12 Queue: 0, Forwarding classes:
best-effortQueued:Packets : 550929 192 pps . => Sum of 64 + 128pps. PR1429628
20
Any packet greater than the MTU size are accounted for as oversized packets. Packets exceeding MTU
•
sizes are not considered for Jabber check. PR1429923
The statistics are accessed through ACX5448-D API, which is the same for both tagged and untagged
•
packets. This cannot be changed in accordance with MX Series, because it is direct access from
ACX5448-D without any statistics changes specific to tagging from the ACX5448 side. The issue will
impact other statistics if changes are made. PR1430108
The port LEDs glowing during system/vmhost halt state is the expected behavior across all ACX Series
•
platforms. Even the system LED glows during halt state. PR1430129
These are initial transient messages seen. They do not have any functional impact. PR1430355
•
1-Gigabit Ethernet interfaces are shown as 'xe'. Therefore, the cosmetic issue is observed with respect
•
to autonegotiation parameters although there is no impact on functionality. PR1430835
If Layer 2 VPN sessions have OAM control-channel option set to <router-alert-label>, the
•
<no-control-word> option in the Layer 2 VPN shouldn't be used for BFD sessions to come up. PR1432854
BCM SDK currently does not supporting stats today, we see routes are getting reinstalled on a periodic
•
basis. SDK does not support stats unless we move to Flex mode in KBP. This is a product limitation
today. PR1435579
New rate of 1.8 MBps if it is megabyte per second takes 16-17 minutes to copy the ACX5448 image
•
(1.9G image size) - RIO rates are less than Misha because rate limiter is in bps and does not support
pps-based (HW limitation from DNX)*Avg size is 512 - hence rate is approx 1/3rd of Misha rate. In file
copy cases -- normal pkt size seen are 1500 pkt sizes. PR1439960
The hold timer expiry is common across all platforms. It is not specific to ACX5448 platforms. PR1439980
•
Remote loopback is not supported on ACX5448-D. PR1443517
•
The PEM entries for jnxFruName SNMP index are shown twice. PR1446215
•
ACX Series routers support only 900 joins of IGMPv3 users per second.PR1448146
•
2000 EVPN IRB scale is not hitting due to hardware limitation of filter entries that can be installed for
•
EVPN instances. We can support only a scale of 1000 IRB interfaces for Junos OS Release 19.2. This is
Broadcom limitation and cannot be changed. PR1461309
Counters for filtering based on DA MAC and SA MAC are not supported because QMX doesn't have
•
any separate counter to count matched or dropped packets with interface MAC address. PR1463981
21
SEE ALSO
What's New | 11
What's Changed | 16
Open Issues | 21
Resolved Issues | 24
Documentation Updates | 29
Migration, Upgrade, and Downgrade Instructions | 30
Open Issues
IN THIS SECTION
General Routing | 22
MPLS | 24
Learn about open issues in this release for ACX Series routers.
For the most complete and latest information about known Junos OS defects, use the Juniper Networks
online Junos Problem Report Search application.
General Routing
Forwarding when using a nonexisting SSM map source address in IGMPv3 instead of pruning. This is a
•
day 1 design issue, and needs a design solution. PR1126699
When Layer 3 packets are classified, DiffServ code points are not preserved but are getting lost at the
•
egress interface because of a chipset limitation. PR1322142
ACX5448: When a 1-Gigabit SFP transceiver is plugged into the router, autonegotiation is enabled by
•
default. There is no functional impact. Only the output of show interfaces <intf-name> extensive CLI
command show the autonegotiation field as disabled. PR1343679
If set interfaces ae<>xaggregated-ether-options link-speed <x> configured in the router, the AE interface
•
remains down after reboot. The following error message is seen in logs: /kernel: kernel did not add link
ae1, link speeds differ 1000000000 10000000000 /kernel: bundle ae1.0: link xe-0/3/0 not added due
to speed mismatch PR1357012
22
Unexpected traffic loss is observed during link failure (FRR convergence) and link restoration test on
•
Layer 3 VPN traffic over LDP-OSPF MPLS LSP.
Steps to re-create:
1. Layer 3 VPN traffic was flowing end to end on the active path in steady state.
•
2. Link down state is induced on primary path and traffic is shifted to backup pathObservation: More
•
than expected traffic loss is observed (around 1.5 seconds)
3. Link is restored and the traffic is moved to the active path. Observation: More than expected traffic
•
loss is observed (around 21 seconds).
The traffic loss percentage is not consistent and varies across each run and this is the worst case traffic
loss percentage observed. PR1387834
The switchover time observed was more than 50 minutes under certain soak test conditions with an
•
increased scale with a multiprotocol multirouter topology. PR1387858
IGMP packets over Layer 2 Circuit with Control-Word are dropped in ACX5048. PR1394301
•
A jnxIfOtnOperState trap notification is sent for all ot interfaces. PR1406758
•
Layer 2 rewrite is happening on regular bridge domain and VLAN interfaces, although there are some
•
service dependencies (VPLS in this case),due to which the egress interface map table is not updated
properly with the Layer 2 rewrite map ID; as a result, the rewrite does not work. PR1414414
Policer-discarded packets are marked as color black. Black color is used to discard the packets in the
•
pipeline. These packets are not really enqueued into the queues (VoQs) in hardware. The HW queue
statistics show this as discarded. However today, both actual-enqueued and the discarded counts are
shown as queue-stats in software. This is a software queue-statistics show issue. PR1414887
Clock Class value is incorrect in Default Data (show ptp clock) when the slave interface is down in
•
PTP-OC device. PR1416421
Clock Class value is incorrect in Default Data (show ptp clock) when the slave interface is down in the
•
PTP-OC device. PR1416421
On ACX5448 devices, the zero-touch provisioning (ZTP) process will proceed with image upgrade even
•
in situations when there is a mismatch between the platform name of the software image stored on FTP
or ZTP servers and the actual platform where the ZTP process is being run. PR1418313
There was a behavior change introduced as part of PR#1307666, where the inner VLAN tag is popped
•
out on the ingress side when an IP packet with double-tagged VLAN is received and this change is needed
for IP packets to work on proper transmit on the egress interface. PR1422515
The request system reboot command on ACX5448 triggers a reboot on the host (Linux) instead of just
•
being limited to Junos OS. PR1426486
The em2 interface configuration is causing the FPC to crash during initialization and the FPC does not
•
come online. After you delete the em2 configuration and restart the router, FPC comes online. PR1429212
Traffic loss is seen if the configuration has /128 prefix routes and it is limited to /128 only. This is due
•
to a known issue tracked in PR 1445231. PR1429833
23
Any packet greater than MTU size will be accounted for as oversized packets. Packets exceeding MTU
•
sizes are not considered for Jabber check. PR1429923
The port LEDs glowing during system/vmhost halt state is the expected behavior across all ACX Series
•
platforms. Even the system LED glows during halt state. PR1430129
Packets dropped due to MTU checks in the output interface are not accounted for as MTU errors. All
•
packets with sizes greater than the MTU size are accounted for as oversized in the input interface.
PR1430446
Protocols get forwarded when using a nonexisting SSM map source address in IGMPv3 instead of pruning.
•
This is a day 1 design issue and needs a design solution. PR1435648
On ACX5448, after deactivating and then activating CoS, traffic drop might be seen. PR1436494
•
In a certain test conditions, it was observed that Layer 2 VPN at a scale of 16,000 had issues when all
•
VPNs were brought down and then up. PR1439471
Recovery of Junos volume is not possible from OAM menu. PR1446512
•
Drop profile maximum threshold might not be reached when the packet size is other than 1000 bytes.
•
This is due to the current design limitation. PR1448418
When a 10-Gigabit Ethernet interface working in 1-Gigabit Ethernet mode in ACX5448-D, is added to
•
a member link of an AE interface, the speed of AE is incorrectly shown as 10 Gbps. There is no functional
impact. This is a display issue. PR1449887
It is not possible to form 125,000 IGMP groups with ACX5448 router receiving 125,000 IGMP v2 reports
•
per second. This is a product limitation from BCM and CPU host path queuing model. PR1454465
Issue is seen during unified ISSU to Junos OS Release 20.1, 20.2, and 19.4 releases. ISSU will be completed,
•
but the forwarding plane (PFE) will not function. Forwarding will be affected. PR1483959
High risk. To be committed after regression cycle on 20.3DCB. PR1488935
•
MPLS
The default behavior of local reversion has changed from Junos OS Release 16.1 and that impacts the
•
LSPs for which the ingress does not perform make-before-break. Junos OS does not perform
make-before-break for no-CSPF LSPs. PR1401800
SEE ALSO
What's New | 11
What's Changed | 16
24
Known Limitations | 19
Resolved Issues | 24
Documentation Updates | 29
Migration, Upgrade, and Downgrade Instructions | 30
Resolved Issues
IN THIS SECTION
Resolved Issues: 19.2R2 | 25
Resolved Issues: 19.2R1-S1 | 28
Resolved Issues: 19.2R1 | 28
Learn which issues were resolved in the Junos OS main and maintenance releases for ACX Series routers.
For the most complete and latest information about known Junos OS defects, use the Juniper Networks
online Junos Problem Report Search application.
Resolved Issues: 19.2R2
Class of Service (CoS)
The dfwd crash can be seen with the forwarding-class configuration in policers. PR1436894
•
General Routing
ACX5000 MacDrainTimeOut and bcm_port_update failed: Internal error. PR1284590
•
bcmDPC task is high even though Interupt START_BY_START flag set to 0. PR1329656
•
On an ACX Series router, the LED on a Gigabit Ethernet interface goes down when the 10-Mbps speed
•
is added. PR1385855
Link fault signaling (LFS) is not working on ACX5448 10/40/100GbE interfaces. PR1401718
•
Kernel memory leak in virtual-memory due to interface flaps (CVE-2020-1625). PR1407000
•
High CPU consumption for fxpc processes with class-of-service changes on AE interfaces. PR1407098
•
The optic comes with Tx enabled by default. As the port is administratively disabled, the port is stopped
•
but as the port has not been started, it does not disable Tx. PR1411015
25
ACX5448: 40G FEC on ACX5448 is default FEC is enabled need to align with our platforms MX/QFX
•
where FEC is NONE. PR1414649
ACX5448: BFD Timer values are not as per the configured 900ms with multiplier 3. The values are
•
showing 6.000 with multiplier 3 instead for most of the sessions. PR1418680
[ARP] ACX5448-D: 96000 ARPs are getting populated but only 47,000 next-hop entries are present.
•
Therefore, around 50% packet drop is observed. PR1426734
Drift messages in ACX2200, which is a PTP hybrid (PTP + Synchronous Ethernet) device. PR1426910
•
The chassisd process might crash with unsupported HCoS configuration when MX104 is used as the
•
fusion aggregation device. PR1430076
On ACX5448, upon reboot of an MC_LAG peer, when the peer comes up (but before hardware comes
•
up), there is a 10-20 second traffic hit on node1. PR1430910
ACX5448-D interface support: After chassis control restart, load balancing on the child interfaces of an
•
ae interface stops. PR1431206
The l2cpd process might crash and generate a core file when interfaces are flapping. PR1431355
•
ACX5448 might malfunction in encapsulating small packets if egress link is 40G or 100G. PR1434900
•
In ACX Series platforms, no-vrf-propagate-ttl might not work after the CoS configuration is deactivated
•
and then activated. PR1435791
LACP state might get stuck in 'Attached' state after disabling peer active members. PR1439268
•
Packet drop might be seen on an ACX Series platform when chained composite next hop is enabled for
•
L3VPN. PR1439317
Interface on ACX1100 remains down when using SFP-1FE-FX (740-021487). PR1439384
•
On ACX5448, DHCP packets are not transparent over Layer 2 circuit. PR1439518
•
When the interface is flapped between channelized configurations (25GbE to 100GbE), the AE interface
•
configuration is not cleaned up properly. PR1441374
ACX5448: Packet buffer error from Packet Forwarding Engine leading to memory leak when IGMP is
•
sent from NNI AC in Layer 2 circuit and VPLS. PR1442901
RED drops might be seen after link flaps or CoS configuration changes. PR1443466
•
ACX5448: The encapsulation flexible-vlan-tagging is not supported with the MPLS family; need to
•
provide commit error. PR1445046
ACX5448/18.3R1-S4.1 not performing proper dot1p CoS rewrite on interfaces configured with
•
l2circuit/local-switching/family ccc. PR1445979
In ACX Series routers, auto-exported routes between VRFs might not reply for ICMP echo requests.
•
PR1446043
Fans on an ACX5448-M might not be running at the correct speed. PR1448884
•
26
Layer 2 circuit with a backup-neighbor (hot-standby) configured might stop forwarding traffic after
•
failovers. PR1449681
Oper-state for et interface does not transition from 'init' to 'Normal'. PR1449937
•
FPC core files might be seen after changing the configuration of PTP or Synchronous Ethernet. PR1451950
•
Platforms: ACX5448-D interfaces support: After the 100-Gbps and 40-Gbps interfaces are disabled,
•
the Laser output power in show interfaces diagnostics optics shows some values. PR1452323
ACX5448 FPC crashed due to segmentation fault. PR1453766
•
Incorrect operating state displayed in SNMP trap for fan removal. PR1455577
•
ACX5048 SNMP polling will be stalled after a link flap or an SFP transceiver replacement, and
•
ACX_COS_HALP(acx_cos_gport_sched_set_strict_priority:987): Failed to detach logs will be seen.
PR1455722
ACX6360-OX: Enable the gigether option to configure Ethernet FEC on client ports. PR1456293
•
ACX5448-D and ACX5448-M devices do not display airflow information and temperature sensors as
•
expected. PR1456593
ACX5448 L2VPN with encapsulation-type ethernet stops passing traffic after a random port is added
•
with VLAN configuration. PR1456624
The rpd crash might be seen if a BGP route is resolved over the same prefix protocol next hop in an
•
inet.3 table that has both RSVP and LDP routes. PR1458595
Route resolution is not happening when the packet size is 10,000. PR1458744
•
Traffic might be silently dropped during link recovery in an open Ethernet access ring with ERPS
•
configured. PR1459446
ACX5000: SNMP MIB walk for jnxOperatingTemp not returning anything for FPC in new versions.
•
PR1460391
ACX5448-D interfaces and optics support: Sometimes, when the AE interfaces are brought up, there
•
are ARP resolution issues. PR1461485
On ACX Series platforms, the LLDP neighbor not up on a LAG after software upgrade to Junos OS
•
Release 18.2R3-S1. PR1461831
Memory leak on l2cpd process might lead to l2cpd crash. PR1469635
•
RED drop on interface even without any congestion. PR1470619
•
Egress queue statistics are not applicable to ae interface on model ACX5048. PR1472467
•
ERP might not come up properly when MSTP and ERP are enabled on the same interface. PR1473610
•
dcpfe core files are seen when disabling/enabling MACsec using Toby scripts. PR1479710
•
ACX5448 Layer 2 VPN with interface ethernet-ccc input-vlan-map/output-vlan-map can cause traffic
•
to be dropped silently. PR1485444
27
Interfaces and Chassis
Upgrade from releases before Junos OS Release 17.4R1 results in cfmd core files. PR1425804
•
MC-AE interface might show as unknown status if you are adding the subinterface as part of the VLAN
•
on the peer MC-AE node. PR1479012
Layer 2 Ethernet Services
DHCP request might get dropped in a DHCP relay scenario. PR1435039
•
Platform and Infrastructure
The REST API process becomes nonresponsive when a number of requests come at a high rate.
•
PR1449987
Routing Protocols
Export of loopback address to other VRF instances might not work on ACX Series, EX Series and QFX
•
Series platforms. PR1449410
The routing protocol process (rpd) crashes while processing a specific BGP update information.
•
PR1448425
MPLS LDP might still use stale MAC addresses of the neighbor even if the LDP neighbor's MAC address
•
changes. PR1451217
The rpd might crash continuously due to memory corruption in IS-IS setup. PR1455432
•
Receipt of certain genuine BGP packets from any BGP speaker causes rpd to crash. PR1497721
•
VPN
The l2circuit neighbor might be stuck in RD state at one end of MG-LAG peer. PR1498040
•
Resolved Issues: 19.2R1-S1
General Routing
Link Fault Signaling (LFS) do not work on ACX5448, ACX5410, ACX5440, and 100-Gigabit Ethernet
•
interfaces. PR1401718
In an ACX5448 platforms, when the Packet Forwarding Engine failed to allocate packet buffer, portion
•
of packet memories might not be free. PR1442901
Resolved Issues: 19.2R1
Class of Service (CoS)
The error message STUCK_BUFF : port_sp not empty for port 35 sp 1 pkts:1 is seen when a lag bundle
•
is configured with 64 lag links.. PR1346452
28
General Routing
The 1G copper module interface shows "Link-mode: Half-duplex". PR1286709
•
On an ACX ring topology, after link between ACX and MX flaps, VPLS RI on PE (MX) has no MAC of CE
•
over l2circuit. PR1360967
ACX5000: fpc0 (acx_rt_ip_uc_lpm_install:LPM route add failed error) Reason : Invalid parameter after
•
configuring lpm-profile. PR1365034
ACX5448: LIBCOS_COS_TVP_FC_INFO_NOT_FOUND: Forwarding-class information not specified"
•
prints while committing on configuration prompt. PR1376665
On ACX5448, channelized ET interface of 25-Gigabit interface will not come up after chassis-control
•
restart. PR1379288
ACX 5448:100 Gigabit link FEC enabled by default on 100G LR4. PR1389518
•
On ACX Series platforms, the forwarding-option dhcp-relay forward-only command stops working and
•
the DHCP packets are dropped. PR1392261
On ACX5048, RPM RFC 2544 benchmarking test failed to start. PR1395730
•
CFM adjacency is not going down with distinct intervals. PR1397883
•
Dynamic tunnels are not supported on ACX Series routers. PR1398729
•
VLAN tagged traffic arriving on VPLS interface might get dropped. PR1402626
•
ot/et interface is not created when invalid speed is configured. PR1403546
•
ACX 5448: TrTCM Policer configuration parameters are as per RFC4115. PR1405798
•
The show services inline stateful-firewall flow or show services inline stateful-firewall flow extensive
•
command might cause a memory leak. PR1408982
ACX Series routers drop DNS responses that contain an underscore. PR1410062
•
VPLS traffic might stop across ACX5000 with the aggregated Ethernet interface. PR1412042
•
Junos PCC might reject PCUpdate/PCCreate message if there is metric type other than type 2. PR1412659
•
Number of inet-arp policers implemented on ACX5000 has been increased from 16 to 64. PR1413807
•
Swap memory is not initialized on boot on ACX5048. PR1415898
•
Commit error while configuring firewall with term having log/syslog and accept actions. PR1417377
•
CoS table error can sometimes cause traffic outages and SNMP timeouts if the optic is plugged out and
•
inserted back. PR1418696
Slow copy image speed to ACX5448. PR1422544
•
29
SEE ALSO
What's New | 11
What's Changed | 16
Known Limitations | 19
Open Issues | 21
Documentation Updates | 29
Migration, Upgrade, and Downgrade Instructions | 30
Documentation Updates
IN THIS SECTION
Installation and Upgrade Guide | 30
This section lists the errata and changes in Junos OS Release 19.2R2 for the ACX Series documentation.
Installation and Upgrade Guide
Veriexec explained (ACX Series)—Verified Exec (also known as veriexec) is a file-signing and verification
•
scheme that protects the Junos operating system (OS) against unauthorized software and activity that
might compromise the integrity of your device. Originally developed for the NetBSD OS, veriexec was
adapted for Junos OS and enabled by default from Junos OS Release 7.5 onwards.
[See Veriexec Overview.]
SEE ALSO
What's New | 11
What's Changed | 16
Known Limitations | 19
Open Issues | 21
30
Resolved Issues | 24
Migration, Upgrade, and Downgrade Instructions | 30
Migration, Upgrade, and Downgrade Instructions
IN THIS SECTION
Upgrade and Downgrade Support Policy for Junos OS Releases | 30
This section contains the upgrade and downgrade support policy for Junos OS for the ACX Series Router.
Upgrading or downgrading Junos OS might take several minutes, depending on the size and configuration
of the network.
For information about software installation and upgrade, see the Installation and Upgrade Guide.
Upgrade and Downgrade Support Policy for Junos OS Releases
Support for upgrades and downgrades that span more than three Junos OS releases at a time is not
provided, except for releases that are designated as Extended End-of-Life (EEOL) releases. EEOL releases
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